Jonathan Cahn is a Messianic Jewish Rabbi and pastor best known for his best selling novel The Harbinger, in which he compares the United States and the September 11 attacks to ancient Israel and the destruction of the Kingdom of Israel. In particular, he sees Isaiah 9:10 as a prophetic warning to the United States. The Harbinger was followed with The Harbinger Companion: With Study Guide. Bio from Wikipedia, the free encyclopedia.